associations - How can I set up a static form for adding associated records in Rails? -

i have following models i'm using...

game

class game < activerecord::base    has_many :workout   has_many :participations  end 

participation

class participation < activerecord::base    belongs_to :player   belongs_to :game  end 

workout

class workout < activerecord::base    belongs_to :player   belongs_to :game   has_many   :measurables  end 

measurable

class measurable < activerecord::base    belongs_to :workout  end 

workout nested resource player. usually, create workout record on player 1 @ time. add measurables workout using gem nested_fields_for allow me add/remove 1 measurable @ time, 1 player @ time. i'm trying build form user edit multiple measurables every player participating in game.

example form

player            |    height   |    weight    |   hand span  | player 1's name     [input box]   [input box]     [input box] player 2's name     [input box]   [input box]     [input box] player 3's name     [input box]   [input box]     [input box] player 4's name     [input box]   [input box]     [input box] 

i've far created view under views/games directory edit_measurables.rb , action in games_controller called #edit_measurables. planning create_or_find workout corresponds game here , build form shown above. though i'm not sure go here. has me thinking have incorrectly organized models , associations.

update:

i've managed little further along, i'm still running few issues, albeit outside scope of question.

the form i'm wanting construct i'm trying handle in following way...

<table>   <thead>     <tr>       <th>player</th>       <th>height</th>       <th>weight</th>       <th>hand</th>     </tr>   </thead>   <tbody>     <% @game.participations.each |participant| %>       <% player = participant.player %>        <% simple_form_for participant.player |player_form| %>         <% workout = workout.find_or_create_by(...) %>         <% @measurables.each {|m| workout.measurables.build(...) unless workout.measurables.any? { ... } } %>        <tr>         <td><%= player.full_name %></td>          <% player_form.nested_fields_for :measurables, workout.measurables, wrapper_tag: :td |measurable_form| %>           <td><%= measurable_form.input :value, label: false %></td>         <% end %>       </tr>     <% end %>   </tbody> </table> 

<% game.participations.each |participation| %>   <% workout = participation.game.workout %>   <%= form_for participation.player |player_form| %>     <%= fields_for player.measureables.where(workout: workout) |measurable_form| %>       <%= measurable_form.text_field :height %>     <% end %>   <% end %> <% end %> 

so you're doing giving player set of measurables each workout, of game has one?

the problem here you've not associated measurables game & player, through participations. think why you're seeing problem; measurables have pulled unrelated table.

if case, why not put measurables in participation model?

the "has_one" workout mean 1 workout game... means game belong_to workout?? if case, participating in game able store measurables that game in participation model...

--

#app/views/games/edit.html.erb <%= form_for @game |f| %>     <%= f.fields_for :participations |p| %>        <%= p.object.player.name unless p.object.new_record? %>        <%= p.collection_select :player_id, player.all, :id, :name if p.object.new_record? %>        <%= p.number_field :measurable_height %>        <%= p.number_field :measurable_weight %>        <%= p.number_field :measurable_hand_span %>     <% end %>     <%= f.submit %> <% end %> 

this allow associate measurables directly:

#app/models/game.rb class game < activerecord::base    belongs_to :workout    has_many   :participations    has_many   :players, through: :participations end  #app/models/participation.rb class participation < activerecord::base    #id | player_id | game_id | measurable_height | measurable_weight | measurable_hand_span | created_at | updated_at    belongs_to :player    belongs_to :game end 

with following controller:

#app/controllers/games_controller.rb class gamescontroller < applicationcontroller     def new      @game = game.new      @game.participations.build #-> needed "add" fields    end     def edit      @game = game.find params[:id]    end     def update      @game = game.find params[:id]      @game.update update_params    end     private     def update_params      params.require(:game).permit(partipations_attributes: [:measurable_height, :measurable_weight, :measurable_hand_span])    end end